Works also with 2 – 6.5hp Honda & Honda cloned engines GC160, GC190, GX120, GX140, GX160, GX200. Up to 7HP engines.Common clutch for 3.5-7hp engines 2200 RPM using #40/41/420 chain. A perfect replacement for Go Kart Minibike Baja Mini Bike MB165 & MB200. This item is also a perfect replacement part on many small utility 163cc 5.5 Hp and 196cc 6.5 Hp engines. Mounts onto crankshaft using bolt and washer on the end of the crankshaft. Two Set Screws are NOT included! No Holes for Set Screws! Teeth: 10T Bore Size: 3/4 inch Competiable Chain Size: #40/41/420 Engagement Speed: 2000??100 RPM Horse Power: Up to 6.5 HP Keyway: 3/16 inch Outside Diameter: 4.22 inch Features: Centrifugal Clutch 10 tooth, 3/4″ bore, #40/41/420 chain with 3/16 key built in.; Compatible with: Baja Mini Bike MB165 & MB200 (Ba